Anthropic: Claude Opus 4.5

Name: Anthropic: Claude Opus 4.5
Author: OpenRouter

Claude Opus 4.5 is Anthropic’s frontier reasoning model optimized for complex software engineering, agentic workflows, and long-horizon computer use.

Context

200K

Max output

64K

Input price

$5/1M tokens

Output price

$25/1M tokens

Capabilities

Show unsupported (4)

Reasoning & Interaction

Reasoning

Tool Calling

Output Control

Structured Output

JSON Mode

Details

Model IDanthropic/claude-opus-4.5

ProviderOpenRouter

CreatorAnthropic

Familyclaude-opus

License—

Status—

Typechat

Input modalitiesimage, text

Output modalitiestext

Open weight—

Parameters—

Architecture—

Context window200K tokens

Max input—

Max output64K tokens

Reasoning tokens—

Knowledge cutoff—

Release date2025-11-24

Sourceofficial

Tools

Function Callingfunction_calling

Call external functions and APIs

Pricing

Input

Output

$25

Cache write

—

Cache read

$0.5

Batch in

—

Batch out

—

Family Comparison: claude-opus

Model	Caps	Perf	Speed	Context	Max out	Pricing
Anthropic: Claude Opus 5.5 (batch)	RTJJM	—	—	1M	128K	$2$10
Anthropic: Claude Opus 4.5 (batch)	RTJJM	—	—	200K	64K	$2.5$12.5
Anthropic: Claude Opus 4.6 (batch)	RTJJM	—	—	1M	128K	$2.5$12.5
Anthropic: Claude Opus 4.7 (batch)	RTJJM	—	—	1M	128K	$2.5$12.5
Anthropic: Claude Opus 4.8 (batch)	RTJJM	—	—	1M	128K	$2.5$12.5
Anthropic: Claude Opus 5 (batch)	RTJJM	—	—	1M	128K	$2.5$12.5
Anthropic: Claude Opus Latest	RTJJM	—	—	1M	128K	$4$20
Anthropic: Claude Opus 5.5	RTJJM	—	—	1M	128K	$4$20
Anthropic: Claude Opus 4.5	RTJJM	—	—	200K	64K	$5$25
Anthropic: Claude Opus 4.6	RTJJM	—	—	1M	128K	$5$25
Anthropic: Claude Opus 4.7	RTJJM	—	—	1M	128K	$5$25
Anthropic: Claude Opus 4.8	RTJJM	—	—	1M	128K	$5$25
Anthropic: Claude Opus 5	RTJJMSB	—	—	1M	128K	$5$25
Anthropic: Claude Opus 4.1 (batch)	RTJJM	—	—	200K	32K	$7.5$37.5
Anthropic: Claude Opus 4.8 (Fast)	RTJJM	—	—	1M	128K	$10$50
Claude Opus 5 (Fast)	RTJJM	—	—	1M	128K	$10$50
Anthropic: Claude Opus 4.1	RTJJM	—	—	200K	32K	$15$75
Anthropic: Claude Opus 4	RT	—	—	200K	32K	$15$75
Anthropic: Claude Opus 4.6 (Fast)	RTJJM	—	—	1M	128K	$30$150
Anthropic: Claude Opus 4.7 (Fast)	RTJJM	—	—	1M	128K	$30$150

API

GET/v1/models/openrouter/anthropic/claude-opus-4.5

Anthropic: Claude Opus 4.5

anthropic/claude-opus-4.5

Claude Opus 4.5 is Anthropic’s frontier reasoning model optimized for complex software engineering, agentic workflows, and long-horizon computer use.

Changes · 3 entries

anthropic/claude-opus-4.5update1cd659eMar 24, 2026, 04:19 AM

capabilitiesjson modeyes

anthropic/claude-opus-4.5update2b100acMar 23, 2026, 05:30 AM

model_typechat

release_date2025-11-24

taglineClaude Opus 4.5 is Anthropic’s frontier reasoning model o...

tools["function_calling"]

anthropic/claude-opus-4.5create7f5c66fMar 21, 2026, 05:16 AM